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How many molecules are in 10.0 moles of H2O?

Answer 1

Well, in one mole of stuff there are #"Avogadro's Number, "N_A#, individual items of stuff.

#"Avogadro's Number,"# #N_A#, #=6.022xx10^23*mol^-1#.

#10.0*molxxN_A=10.0*cancel(mol)xx6.022xx10^23*cancel(mol^-1)#

#=# #6.022xx10^24" individual water molecules."#

Note that had you been asked #"how many eggs are in 2 dozen eggs"# I think you would have very very quickly given the answer. #N_A# is a collective number like the #"dozen"#; the only difference is that #N_A# is monumentally larger.

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Answer 2

Natalie Anton

There are approximately 6.022 x 10^24 molecules in 10.0 moles of H2O.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.